ive found far more ign switch failures in high switched load cars....so yea aftermarket crap does add to the draw and increase the wear and tear.
as a mech I noticed a lot of the failures are high switched loads...ie key is switched with fan/wipers/ac/wideband on and you get a higher current draw at the ign terminals besides the usual. extra current leads to greatting contact pitting. switch off components before turning the car off and yourd probably extend its life by at least a 1/4
using the oem ign to switch a honest to goodness 30-40 amp high quality relay is the preferred fix for this issue which spans many manufacturers and cars
